BRITISH SPONGES. 
19 
h. Small mass, washed. Devonshire. Presented by G. 
Johnston, M.D. 
c, d e. Mass, washed. Presented by G. Johnston, M.D. 
f. Rounded mass with dry mucus. Presented by G. John- 
ston, M.D. 
3. Spongia? laevigata. 
Spongia laevigata, Montagu in Wern. Mem. ii. 95. pi. 16. fig. 4 ; 
Flem. Brit. Anim. 526 ; Johnst. Brit. Sp. pp. 170, 250. 
Scypha laevigata. Gray, Brit. PI. i. 358. 
Inhab. ? 
Dubia ? 
? Spongia prolifera. Grant, Edinb. Phil. Journ.xiv. 116 (not So- 
lander and Ellis) ; not described. 
Inhab. ? 
7. DVsidea. 
Duseideia, Johnston, 1842, p. 185. 
Dysidea, Johnston, 1842, p. 251. 
1. Dysidea fragilis. 
Spongia fragilis, Montagu in Wern. Mem. ii. 114. pi. 16. figs. 1,2; 
Gray, Brit. PI. i. 360 ; Flem. Brit. Anim. 526 ; Tem^etoii in 
Mag. Nat. Hist. ix. 471- 
Duseideia fragilis, Johnst. Brit. Sp. p. 187. t. 13. fig. 6, and 1. 14. 
fig. 4. 
Dysidea fragilis, Johnst. Brit. Sp. 251. 
Ilalichondria areolata, Johnst. Brit. Sp. 121. 1. 13. fig. 4, pp. 197 
and 247. 
a, b, c, d. Washed. Presented by G. Johnston, M.D. 
fi Q, h, i, with the mucus preserved to dry. Presented 
by G. Johnston, M.D. 
j. with mucus in spirits. Presented by G. Johnston, M.D. 
k. “ Ilalichondria areolata.” 
l. Spicula of a, in Canada balsam. Prepared by J. S. 
Bowerhank, Esq. 
a. Hal. areolata.” Portaferry, Strangford Lough, W. 
Thompson, Esq. Presented by G. Johnston, M.D. 
